Mechanism for applying pressure to the drafting rollers of spinning and other textile preparatory machines



R. BALM ES SOLANAS 2,884,664 MECHANISM FOR APPLYING .TPRESSURE To THE DRAFTING ROLLERS 0F SPINNING AND OTHER TEXTILE PREPARATORY MACHINES w 9 w 1 e n 5 .w v. d a u M i 4 Sheets-Sheet 1 Inventor RAMON BALMES SQL NAS 8011M Ja Attomeys' May 5, 1959 R. BALMES SOLANAS 2,884,664

MECHANISM FOR APPLYING PRESSURE TO THE DRAFTING ROLLERS OF SPINNING AND OTHER TEXTILE PREPARATORY MACHINES Filed June 29, 1955 4 Sheets-Sheet 2 j Inventor RAMON BALMES SOLANAS M km Atzomeys 2,884,664 PRESSURE TO THE DRAFTING May 5, 1959 R. BALMES SOLANAS MECHAN FOR APPLYING R ERS OF SPINNING AND OTHER TEXTILE PREPARATORY MACHINES 4 Sheets-Sheet 3 Filed June 29, 1955 m r RAMON BALMES SOLANAS y 1959 R. BALMES SOLANAS I ,884

MECHANISM FOR APPLYING PRESSURE TO THE DRAFTING ROLLERS 0F SPINNING AND OTHER TEXTILE PREPARATORY MACHINES Filed June 29, 1955 4 Shee ts-Sheet 4 FIG. 1/ g 76 C C! I 5 G3 5 hi /-,3

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I Inventor RAMON BALMES SOLANAS M LW Attorney;

United States Patent MECHANISM FOR APPLYING PRESSURE TO THE DRAFTING ROLLERS OF SPINNING AND OTHER TEXTILE PREPARATORY MACHINES Ramon Balmes Solanas, Barcelona, Spain, assignor to Estirajes Balmes, S.A., Barcelona, Spain, a body corporate of Spain Application June 29, 1955, Serial No. 518,862

2 Claims. (Cl.'19135) This invention rel-ates to improvements in saddle weighting mechanism for the top drafting rollers of spinning and other textile preparatory machines having a plurality of consecutive pairs of drafting rollers, the weighting mechanism being of the type in which the saddle assembly applies weight to three top rollers under the action of a spring mounted on a drafting head and exerting a downward pull on the saddle assembly through a weight hook, a fourth top roller being self weighted.

According to the invention the weighting mechanism comprises a saddle bearing on the front top roller, a lever pivoted on the saddle bearing on the second top roller, a second lever pivoted on the first lever and bearing on the rear top roller, an actuating lever pivoted on the second lever, a weight hook rod pivoted on the pivot of the actuating lever and a leaf spring mounted in the head below the lines of rollers and connected by a rod to the weight hook rod by which pressure is applied through the saddle to the lines of rollers.

This application is a continuation-in-part of my copending application Serial Number 442,027, filed July 8, 1954, now Patent Number 2,769,210.

The invention will be described with reference to the accompanying drawings:

Fig. 1 is a longitudinal section through a drafting head,

Fig. 2 is a detail section (enlarged) of the weight applying mechanism showing the mechanism in the on position,

Fig. 3 is a similar view showing the mechanism in the off position,

Fig. 4 is a section (enlarged) on line 44 Fig. 1,

Fig. 5 is a side elevation of a further arrangement,

Fig. 6 is a longitudinal section of same showing the weighting mechanism in the on position,

Fig. 7 is an end elevation of same looking toward the right in Fig. 5,

Fig. 8 is a detail section showing the weighting mechanism in the off position,

Fig. 9 is a section on line 9--9 Fig. 6,

Fig. 10 is a section on line 10-10 Fig. 6,

Fig. 11 is a plan from below of Fig. 5.

A drafting head A is provided with a saddle B pivoted to the head on a pin b formed with a groove b to receive a spring loaded ball b to retain the saddle B in a raised position with the top lines of rollers out of contact with the bottom lines of rollers.

The saddle B is constructed to apply pressure to three top rollers, viz: the front top roller a, a second top roller a and a rear roller a and consists of a channel shaped arm b pivoted on the head A some distance behind the rear top roller a The flange b of the saddle supports a slotted cradle b to form bearings for the top front rollers A the base of the slot b in the cradle b being inclined to ensure that the top rollers a lie parallel to the front bottom rollers a in the head A. A rib b is formed in the centre of the bearing of the cradle b to apply the pressure to the neck between a pair of rollers a to allow independent movement perpendicular to the line of each roller during use.

A lever C is pivoted between the flanges b of the channel of the saddle B on a pin 0, the free end of the lever resting on the bearing neck of the second top rollers a The rollers a are mounted in slotted cradles b mounted on the saddle B and the rear rollers a are similarly mounted in slotted cradles b and may be prevented from falling therefrom by spring or other clips a The lower edges of the channel sides b are machined at an angle b to engage machined faces on the cradles to ensure parallel mounting of the top and bottom lines of rollers. A second lever C of L shape is pivoted at one end to the lever C on a pin 0 with its free end resting on the bearing neck of the rear roller a A slot c is formed in the lever C through which passes a fulcrum pin c by which actuating lever C is attached thereto. The lever C is formed with a cam or eccentric c on its lower end for engagement with flanges or lugs c on the lever C when in the position shown in Fig. 2. A weight hook rod D is also mounted on the fulcrum pin c the lower end of the rod D being bent into the shape of a hook d.

Pressure may be applied to the hook d by a rod D screwed at its free end and secured by a coupling nut d and screw d to a leaf spring F the free ends of which engage the web of an inverted channel member A carried by the head A. A lock nut d is mounted on the rod D to engage the upper side of the member A when the rod D is disconnected from the rod D and limit the downward movement of the rod D The length of the rod D may be adjusted to apply the requisite pressure to the rod D by the nut d which passes through the channel member A Pressure is applied between the top lines of rollers and the 'bottom lines of rollers by the saddle B when the hook d is engaged by the rod D and the lever C moved to the position shown in Figs. 1 and 2. The pressure exerted on the lines of rollers is adjusted 'by the nut d The pressure is exerted on the front rollers a, a directly by the saddle B, on the intermediate rollers a a by the lever C and on the back rollers a a by the lever C If it is desired to apply pressure to the front and rear rollers a, a without applying pressure to the intermediate rollers a such as when treating long staple fibres, a pin may be inserted through holes 0 in the lever to engage the saddle thereby relieving the pressure on the intermediate rollers a whilst pressure is still applied to the front and rear rollers a, a Pressure may also be applied to the front rollers a or to the front and second rollers a, a with the rear rollers a removed if required.

When the hook d has been disengaged from the weight rod D the saddle B can be raised to remove the weighting pressure and raise the lines of the top rollers from engagement with their corresponding bottom rollers and the ball I: engages the groove b In the arrangement shown in Figs. 5-11 a saddle B is formed from pressed steel and cradles G, G G are formed of U shape to enter between the flanges b of the saddle B the cradle G for the front top roller a being secured in position by a screw g passing through a slot g in the cradle and through the legs g supporting the usual clearing roller A mounted above the saddle. One side of the cradle G is extended downwards and formed with an inturned edge g such that the distance between the inner edges of the two sides is slightly less than the diameter of the neb of the roller a the two sides springing outwards to allow the neb to be forced between them but preventing the roller from falling out when the saddle is lifted.

The cradles G G are secured in position by a bar G lying between the flanges b of the saddle and being clamped thereto by a screw g The cradles G G are also formed with a lip g on one side such that the dis- 3 tance between the inner edges of the two sides below the lip is slightly less than the diameter of the neb of the rollers a a the two sides springing outwards to allow the nebs to be forced between them but preventing the rollers from falling out when the saddle is lifted.

The levers C, C are mounted as described in the parent specification with an actuating lever C pivoted on the pin A curved slot c is formed in the lever C in place of the straight slot of the previous construction whereby the pivot pin 0 of the actuating lever C in releasing the pressure from the lines of top rollers moves rearwardly along the slot allowing for a reduction in the length of the slot in the saddle through through which the lever C passes.

The weight hook D when in the position shown in Fig. 6 hangs vertically but when the actuating lever C is operated to release the pressure a portion of the end c comes into contact with the rod D to move the hook and d into an inclined position to disengage from the rod D (Fig. 8).

The saddle B is pivoted to the head A on a pin b as before described. A transverse spring I: separating two balls h is mounted in a bracket H on the pin b between the flanges b of the saddle B with the balls h engaging the flanges b A pip or dimple h is formed in each flange b to receive the balls h when the saddle is raised to separate the lines of rollers. The bracket H is formed with a projection h to engage the web of the saddle B when the saddle is raised to limit its upward movement.

When the saddle B, B is returned to its normal position and the eccentric lever C is also moved back to its original position the hook d will be moved back into engagement with the top of the weight rod D and further movement of the lever C will re-apply the pressure to the rollers.

The intermediate and back rollers are guided into their correct position relative to the bottom rollers and maintained in this position by the cradles slidably mounted on the saddle B, B so that their positions can be adjusted, the screws g, g being provided for holding them in any desired position. These cradles do not apply any weight to the rollers but merely guide and maintain them in the correct position.

The front rollers a can be removed from and replaced in the saddle B whilst the machine is running without disengaging the weighting mechanism by raising the front of the saddle with one hand and with the other removing the roller a from the slot b To adjust the pressure on the roller 11 it is only necessary to check the pressure on the front roller and the rear roller will automatically receive the desired pressure.

As the saddle B, B is pivoted some distance behind the rear roller a and is also secured at a point inter- 4 mediate its pivot and its free end by the rod D engaging the weight rod D the saddle is rigidly held and the lines of top rollers will consequently be securely held in their correct positions relative to the lines of bottom rollers.

Owing to the relatively long distance of the free ends of the levers C, C applying pressure respectively to the second and rear top rollers any adjustment of the position of the latter will not substantially vary the pressure applied to these rollers.

What I claim is:

1. A saddle weighting mechanism for the top drafting rollers of spinning and other textile preparatory machines having a drafting head and lines of top and bottom front, second and rear drafting rollers, comprising a flanged saddle, a pivot pin secured to the drafting head on which the saddle is mounted for raising and lowering movements and to hear when the saddle is lowered on the front top roller, a first lever pivoted on the saddle and bearing on the second top roller when the saddle is lowered, a second lever pivoted on the first lever and bearing on the rear top roller when the saddle is lowered, an actuating lever having a pivot pin and slot connection with the second lever and swingable into a position for transmitting pressure to the first and second levers and into a position to release such pressure, a weight hook rod pivoted on the pivot pin of the actuating lever, a leaf spring mounted on the drafting head below the lines of rollers, a rod connecting the leaf spring to the weight hook rod for applying pressure through the first and second levers and saddle to the lines of rollers, a bracket fixed to the pivot pin secured to the drafting head, a spring in said bracket between the flanges of the saddle, and balls in said bracket pressed into en gagement by said spring with the flanges of the saddle while the saddle is in raised position to retain the saddle in raised position.

2. A saddle weighting mechanism as defined in claim 1, wherein the flanges of said saddle are provided with dimples into which said balls are pressed by said spring while the saddle is in raised position and from which said balls are disengaged to permit movement of the saddle into lowered position during which said balls maintain pressure on the flanges of the saddle, and including a projection on said bracket engageable by the saddle when raised to limit its raising movement.

' 7 References Cited in the file of this patent UNITED STATES PATENTS 1,210,873 Vales et al. Jan. 2, 1917 2,301,701 Hendrickson Nov. 10, 1942 2,717,426 Noguera Sept. 13, 1955 2,769,210 Solanas Nov. 6, 1956 

